BMW K bikes (Bricks)

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1Back to top Go down   Fuel lines Empty Fuel lines Tue Oct 15, 2013 4:18 pm

Tomnel

Tomnel
active member
active member
I have a rather splendid K75RT in excellent condition but like its owner it is getting on in years. The fuel lines seem intact but they are pretty hard after aging for 18 years. I don't see any replacement interval in the Clymer or Haynes manual. How long are they really good for? Will they eventually rupture? Can I just leave them alone as long as they don't leak, then replace them when I'm doing something else to the bike, e.g. I replaced the internal hose when I did the fuel filter. (Ouch! $32.00 for a one foot piece of submersible fuel line!) 

I take long rides across the U.S. And like to feel that everything is in A1 Condition.

    

2Back to top Go down   Fuel lines Empty Fuel lines Tue Oct 15, 2013 6:50 pm

RT

RT
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Hi Tomnel
most of our bikes are at least 20 odd years old and who knows when the lines were renewed. I thought my 85 RT's lines looked ok, but when I took the tank off and removed the connecting lines I could see that they were all coming apart around the ends that go over the fuel tank/rail spigots. Would've a matter of time to get a leak
in the middle of no where.
I changed mine, Auto supermarket 5/16th internal from memory at cheap prices, but must be "fuel Injection" rated.
If you change them go the whole hog and replace the line from the end of the fuel rail to the Fuel pressure
regulator (have to take the airbox bottom off for this, looks hard but even I have managed it about 4 times so far)
If you get in there you may as well replace the vacuum hose from the last Throttle body to the bottom of the fuel pressure regulator, easy job once the airbox is out of the way. Then you can ride with confidence.

So find about 1 1/2 hours one day and do it. Don't forget to ask questions if you're not sure.(get all the hose first)
Good luck
RT


__________________________________________________
2011 R1200RT
    

3Back to top Go down   Fuel lines Empty Re: Fuel lines Tue Oct 15, 2013 7:40 pm

92KK 84WW Olaf

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BMW are quite cheap for the genuine fuel line, I bought a length for €19 which I think is about $15. Replace them all as you say, they do perish where they go over the spigot and while you are doing it make them a little longer so you can lift up the tank to access the electrics and coolant without taking them off. If the bike has been sitting they will harden and then a few tank off services will leave them very prone to failure. A fuel leak under pressure near the engine and exhaust is no fun.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

4Back to top Go down   Fuel lines Empty Re: Fuel lines Wed Oct 16, 2013 2:42 am

the.postman

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92KK K100LT 193214 wrote:€19 which I think is about $15.
More like $25


__________________________________________________
1985 K100 RS   104EA49840092        #0081788     SILVERish (Madison) Prod. date 05/12/84
1984 srx 600
1986 cbr1000f/h
    

5Back to top Go down   Fuel lines Empty Re: Fuel lines Wed Oct 16, 2013 11:00 am

92KK 84WW Olaf

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@the.postman wrote:
92KK K100LT 193214 wrote:€19 which I think is about $15.
More like $25
True. We have funny yoyos over here but my mistake. I have 2 lengths of the stuff in my shed. Replaced them on LT and forgot there was enough left to do the RT. Bought another one for the RT along with service kit and a load of bits then when putting the left over bit from the RT in its place there was the leftover from the LT looking at me..


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

6Back to top Go down   Fuel lines Empty Re: Fuel lines Wed Oct 16, 2013 8:56 pm

RicK G

RicK G
admin
admin
Know how you feel after years of fixing bikes/cars (but not chain saws or mowers) I have almost 2 of everything.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

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